The man's teeth flashed, very white against his dark skin.
She saw his white teeth flash in the light of the setting sun.
She had big white teeth, flashing at me in her wide smile.
His teeth flashed when he smiled at the two of them.
His teeth flashed white as he gave us a huge grin.
He looked up at me suddenly, and I saw his teeth flash in the twilight.
Strong teeth flashed white against the tan of his face.
He grinned, and his white teeth flashed in the dark.
The general grinned, teeth flashing white against his dark skin.
He gave her a grin, white teeth flashing against dark skin.